Deuteronomy 32:41-47

41If I shall whet my glittering sword, and my hand take hold on judgment; I will render vengeance to my enemies, and will reward them that hate me. 42I will make my arrows drunk with blood, and my sword shall devour flesh; and that with the blood of the slain and of the captives, from the beginning of revenges upon the enemy. 43Rejoice, O ye nations, with his people: for he will avenge the blood of his servants, and will render vengeance to his adversaries, and will be merciful to his land, and to his people.1

44And Moses came and spoke all the words of this song in the ears of the people, he, and Hoshea the son of Nun.2 45And Moses finished speaking all these words to all Israel: 46And he said to them, Set your hearts to all the words which I testify among you this day, which ye shall command your children to observe to do, all the words of this law. 47For it is not a vain thing for you; because it is your life: and through this thing ye shall prolong your days in the land, where ye go over Jordan to possess it.